fixup! ci: Check MSRV

Author: robin-nitrokey

.github/workflows/ci.yml

@@ -50,11 +50,22 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install build dependencies
+        shell: bash
+        run: |
+          apt-get update -y -qq && apt-get install -y -qq llvm libc6-dev-i386 libclang-dev
+
+      - uses: fiam/arm-none-eabi-gcc@v1
+        with:
+          release: "9-2020-q2"
+
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: 1.87
+          target: thumbv7em-none-eabi
           override: true
+          components: llvm-tools-preview
 
       - name: Build
-        run: cargo build --release --all-features --all-targets --target x86_64-unknown-linux-gnu
+        run: cargo build --release --all-features --all-targets --target thumbv7em-none-eabi